Machine



July 6 1926.

maamma W. L. DIXQN FOLDING MACHINE F'iled April 5. 1924 Fig.1

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FQLDING MACHINE Filed, April 5, 4 5 Sheets-Sheet 5 Figi l r'we ni'or.Walfer L Dixon July 6,1926. 5 m 1,591,613

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Patented July 6, 1926.

UNITED STATES 1,591,613 PATENTVOFFICE.

XVALTER DIXON, OF BOSTON, MAEiSJiCHUSE'llTS, ASlilIG-NOR T0 REECEFOLDING MACHINE COMPANY, OF BOSTON, IVJZASFSACEYUSIEITTS, A CORPORATIONOIE MAINE.

FOLDING MAUI-ZINE.

Application filed April 3, 1924. Serial No. 703,951.

This invention involves a novel folding machine, that is an apparatusfor intolding the edges of cloth or other blanks, for example the clothblanks used in the manu'lacture of collars and culls, and involves alsoa novelmethod of 'lolding such blanks, more especially blanks of certainspecific shapes, and involves also a novel product, that is to say atolded blank or a completed collar or other article embodying theparticular and novel form of told of this invention. tiiaid method andproduct however are not claimed herein, being made the subject ol?divisional application Serial Number 718,- 834, filed June 9, 1924.

The general object of the invention is to afford an improved foldingmachine, method and product, of general and s iiecitic utility in thearts. A. special object s to improve the art of folding cloth blanks forcollars, cuffs and other articles 01 clothing, etc. A particular objectis to enable the eliicieat and satisfactory manufacture oi? collars oranalogous articles wherein. one or more of the corners to be folded afairly sharp angle, or an acute angle, substantially less than 90. d iththe shapes having such a corner or corners there has been a problem inproducing a satisfactory told on account of the diliiculty inaccommodating the eracess of nmrginal material. within the small compassof the acute angle. ,lVith previous attempts these corners have been:t'oldcd in a way to produce excess-five thickness or oven bunching of"material, resulting inv an unsightly and uncou'imercial product, andsometimes even, requiring trimmimg oil the excess material, necessarilya separate and manual operation, adding materially to the cost ofmanufacture. Other and further objects of the present invention will beexplained in the hereinafter description of an embodimentthereof, orwill be apparent to those skilled in the art.

To the attainment oil? the objects and advantages referred to thepresent invention consists in the novel machine or a1 ipa.'atus, and thenovel method of operation or manu iacture, and the novel intold orproduct, as well i the novel features ol combination, arrangement,construction, mode of action and detail, herein illustrated ordescribed.

In the accompanying drawings Fig. 1 is an elevation view of the righthand end ht a folding machine embodying the machine ij'eatures oi? thepresent invention and adapted to the practiciu g oi? the method andproduct :leatures, the illustrated machine being shown tor convenienceof the general type illustrated in patents o t' Dixon 956,950, grantedMay 55, 1910 and Reece 972,916, granted October 18, 1919, although the:teatures of the present invention could be em bodied, in verydii'lt'erent types oil machine. It is to be and stood that the priorpatcuts referred to, and machines madeunder them, may be referred to torvarious 1nattors of construction. and detail not specifically involvedin the present invention nor particularly described herein.

Fig. 2 is a tront'elevation ot the upper right hand portion of themachine shown in Fig. 1, with the die or templet and its mechanism andsupport however omitted.

llfig. 3 is a top plan view of the parts shown in Fig. 2. i

l ig. -i-l-, on a smaller scalo, is a plan view oi the defining platesor elements of the die or tcioplet. idiapcd and adapted for cooperationwith the intolding mechanism shown. in F ig. 3.

. g. 5 to 8 inclusive illustrate the succos, ive steps otthe method offolding an acute corner, with the successive positions of the foldingelements.

l f. 9 is a scctiol'i on 9-9 of Fig. 8, slunving how the iui'olders andbed coact to shape snugly the blunt: upon the die.

10 to 1 1 illustrate the piece of cloth or blank itsel'l""i1'1 thesuccessive stages of its process 01 being tolded, Fig. 14!: indicz-ttiugthe completed product or folded blank, intended to be combined orinterlocked with a similar blank for the production ol a collaror otherarticle.

Fig. 15 is a partial front view of a collar coiritracted" ot foldedblanks such as shown in Fig. 14;.

Fig. 16 illustrates a modification 01: the invention, being a foldingclement consist- .ing ot' a single piece adapted to fold the acutecorner in a manner basically similar to that illustrated in Figs. 5 to8.

For convenience the description may be begun with the method andproduct, and the a aratus described. subsequently. The collar 20 shownin Fig. 15 is a turn-over collar having the inside portion. or collarband 21 and the out ide portion or collar top 22, the latter having anacute angled point 23, the

' angle being substantially less than 90 and greater than 45. The dottedlines indicate as will be explained from the other figures. It will beunderstood that in constructing a collar top two folded blanks areassembled and stitched together with their infolded margins at theinterior. In the case illustrated each of the two blanks may embodythepresent invention, and each blank may consist of one or more plies offabric. The two blanks assembled to form a collar top may havethe foldsor flaps oppositely formed so that each may be tucked in under theother, forming what is known as a lock corner, or this feature may beomitted.

In order to describe the steps in forming the folds, according to thisinvention, I start with the original fabric blank 24, the pert1- nentportion of which is shown in Fig. 10. For convenience this is shown as asingle ply blanks The dotted lines, 25 along the side and 26 along theend, indicate where the folds are to be formed, and correspond to thedie and to the final shape of the folded blank and collar. Theintersection of these is the ,acuate angle corner 23, already mentioned.Outside of the line 25 is the side margin 27 of the blank and at the endis 7 shown the margin 28, while at the corner is the rhomboidal marginportion 29.

'While the blank, so described, is defined by a die or templet such asshown in Fig. 4 the margins are manipulated in a special way to producean orderly formation of the material into definite flaps or folds whichare laid over and positioned in such a way as to minimize thedifficulties before referred to. In general the method comprises theformation of an intermediate or upstanding flap of the excess materialand laying this down flatly on top of one of the two lineal folds andthen laying the other lineal fold or margin down flatly upon it. Theprog 'ress is shown in the successive drawings,

Figs. 10 to 15. In Fig.11 the side margin 27 is shown bent up from theplane of the blank. This and the succeeding steps may be performed bymechanism such as shown in Figs. 1 to 9, Figs. 5 to 8 showing some ofthe successive positions of the parts of the mechanism, that is, theinfolders and their operating connections. In Fig. 11, while the sidemargin 27 is being folded along the line 25, the corner margin 29appears in a warped condition, the initial stage in the formation of theintermediate flap or fold.

The completion of the infolding action along the side is indicated inFig. 12. The margin 27 has been laid flatly down into its finalposition. The corner fabric portion 29 however has been formed into anupstanding loop, flap or fold 30. lVhile this may be effected indifferent ways, the other figures show mechanism by which a sideinfolding plate, with a notched formation near the apex 23 is adapted toproduce the intermediate loop or flap 30.

The next stage, shown in Fig. 13, indicates the laying down flatly uponthe infold 27 of the loop or flap 30. The end margin 28 is yet unfoldedwith the exception that a portion 31 thereof, adjacent the corner of theblank, has been folded upon itself, as indicated in Fig. 13, during theformation of the flap 30. The intermediate flap or fold 30 is to be ofsuch dimension that when laid down as in Fig. 13, it will lie whollywithin the angle of the completed blank, and not project beyond thefinal outline.

The next operation is indicated by the final condition, shown in Fig.14, in which the end margin 28 has been folded over, inwardly and downupon the body of the blank and the flap 30. Vhile the folded blank shownin Fig. 14 is the preferred embodiment it may be varied somewhat withinthe scope of this invention. The specific steps and procedure may bevaried. The product or infold is seen to be compact and free frombunching, wrinkling or other results which would tend to spoil thequality or salability of the completed collar.

The completed collar, shown in Fig. 15, may comprite the collar top 22consisting merely of two folded blanks as in Fig. let assembled andstitched together. If a lock corner is desired, it is only necessary toreverse the steps so that the end fold 28 is turned in first and theside fold 27 is turned in last. A blank so folded will interlock with ablank as in Fig. 14.

hen the acute angle of the folded blank is to be less than 60 it isobvious that the described process must be modified to accommodate theentire fabric within the angle; and the principles of the presentinvention may be employed in different ways, for example by manipulatingthe infolders to produce two, instead of one, of the upstanding fiaps orfolds S0; or in the case of a single flap this may be folded back uponitself to prevent any portion of it standing out beyond the outline ofthe product. i Before discussing the mechanism of the machine thoseparts will be referred to which directly contact with the blank. Theblapk, inserted for example by hand, is placed upon a supporting bed orsocalled pad 33, slightly elevated in respect to the immediatelysurrounding fixed parts of the machine.

The die or templet comprises defining plates which come directly uponthe blank upon the bed, and which may include an end plate 35 at eachend, and a longitudinal middle plate 86 bridging the space between theend plates. It will be understood that the shape of the die can bevaried indefinitely according to the product to be manufacltiU lll)

tured. The particular die shown in Fi A: and indicated in Figs. 1 and5-8 is of a form to define a collar top with an acute angle at eachapex. A collar top is usually left unfolded at one of the longitudinalsides, so that the die is shaped to define the other long side edge andthe two ends.

The remaining element that contacts with the blank consists of theinfolders, which preferably normally lie below the level of the raisedsupporting pad 38, but lift and move inwardly for the infoldingoperation. The infolders illustrated, adapted to seep crate with the diedescribed, comprise side infolder plates 38, of which there may be oneat each end of the machine. Each of these near the blank corner 96 isformed with a particular notch 39 or equivalent for mation arranged forproducing the intermediate flap heretofore referred to. The notch 39lies between the body of the infolder plate and a projection or horn a0spaced. therefrom. The blanh ends are infolded by end folder plates 512which may be straight, as shown in Figs. 3-6.

In lieu of separate ii folding plates for the side and end there isshown, in Fig. 16, a modification consisting of a combined side and endfolder plate 441:, havi a the side ed go 45, and the notch 46 and horna? correspcnrh ing to 39 and in the other figures; also the end. edge 48separated from the side by an open area or bay 4-9.

W hen the folders have completed their inward movei'nents, and the foldsare finished, the folders may cooperate further by taking part in asqueezing movement between the bed and folders, preferably after theplates of the die have been extracted from the folds, and thus giving amore durable blank, with edges and corners permanently creased.

A different form of fold can be produced by proper uiiodiiications,namely similar to that described, but with the material. of the flap orloop 36 turned under instead of standing up, so as to have it eventuallyarranged beneath instead of on top of the margin told 27. Such formationmay be effected by a prelimiiuiry folding operation in which the cornermargin 29 is first turned diagonally over the apex 23 and laid down flatupon the die, the adjacent margins 27 and 28 being then successivelyfolded over and down upon it.

In any case the infolder preferably has not only its thin folding edge,which lays the fabric over the die, but a downstanding body or shoulder43, as seen in Fig. 9, which is adapted to come snugly into contact withthe bed or pad 33, shaped to the blank, so that the fabric is compelledto be shaped accurately to the die. This is an important considerationin a structure like the present wherein an intermediate folding step ispe"- formed before the completion of a blank,

creating a likelihood that the fabric will not smoothly turn in uponitself and take the exact shape of the die.

The general machine parts, not being s Jecilically new, may be brieflydescribed as fol lows. The frame 51 may be a rigid structure havingparts extending to the floor and horizontal parts in the nature of atable, carrying the supporting bed or pad 33. The main. or cam shaft 52may be journalled in the usual manner, and driven at the customary speedthrough a worm wheel 53 on the shaft actuated by a worm 54.- on a powershaft 553, driven by belt and pulley. The frame is shown as having theusual upward extensions 57' at the. rear in which is journalled the axleor rock shaft 58 about which the die or teniplet swings in descending tothe bed and lifting therefrom. As already stated the gene a! featuresmay be of various types; for example the die may be of the cross-headtype, sliding downwardly and upwardl Attached to the rock shaft 58 isshown. the die-carrying arm or arms 59. 'lhese extend forwardly andsupport the working mechanism of the die, which may be of arious types,preferably the type in which the die is able to shorten or collapseendwise, while moving bodily sideways, thus gii 'iug dia onal movementof extraction from the fohv Y corners Thus the body portion 60 of thedie may be movable forwardly and rearwardly, while the parts 61 thereonare movable end wise. T he end or corner die plates 35 may be carried onthe endwise moving die parts 61 and the middle or bridgiruz. die plate36 may be carried on the die body portion 60.

In order to effect the descending and liftin g movements of the die itscarrying arm is shown as having a rearward extension 63 from whichextends downwardly a link 64 connecting with one arm of a bell cranklever 65 fulcrumed at 66, the other arm adapted to be acted upon by theusual cam on the cam shaft, operating to swing the lever for lifting thedie, the descent being effected by gravity, under control of the cam.

The cams for operating the die plates are mounted concentrically uponthe axle or rock shaft 58, and they may be rotated through a gear 68which meshes with an idler gear 69 which in turn meshes with a gear 70on the cam shaft The gear 68 constitutes also a cam disk. flhe cam foreffecting bodily movements forwardly and rearwardly of the die parts isnot shown, because at the far side, but this cam. operates through asliding rod 72, moving the rod forwardly and rearwardly, to effect thedie moiun'nents. The endwise or collapsing movements of the die platesare effected through a cam 7a which consults of a groove at the nearside of the gear disk 68, engaged by a follower 75,

mounted on a guiding yoke 76, the forward end of which is attached to asliding plate 77, formed with cams which engage followers on the campart 61, to lengthen and shorten the die in the usual manner.

The infolderplate 38 at the rear side is supposed to be matched byasymmetrically corresponding one at the other end of the machine, andbetween them may be a middle infolder 41 bridging the space between theothers. Each of these infolder plates is attached to a solid body orstock, 78 in the case of the infolder S8, and 79 in the case of theinfolder ll. The usual gages 80 may be attached upon all of theinfolders to insure the operator positioning the cloth blank properly.The infolders 38 are intended to have not merely a forward movement asthey come inwardly upon the blank, but also an endwise movement,illustrated by the difference between Figs. 7 and 8, the forwardmovement producing the upstanding flap 30 as in Fig. 12 and the endwisemovement laying this down as in Fig. 13. For this purpose the stock 78of infolder 38 provided with .an endwise extension 81 having a-slot82-parallel to the forward movement, and adapted to be engaged cammechanism to be described for producing the endwise movement.

The forward movement of the side infolders 3'8 and 41 may beefl'ectedthrough an actuating bar 84. The stock of the middle'infolder may berigidly attached to the actuating bar, but it isprovided with slots 85in which slides a portion of the stock 78 of each folder 38, thuspermitting the endwise movement. 'For effecting the forward and rearwardmovements of the bar 8 1 and the side infoldersthe bar is shownprovided'with lugs 86 extending rearwardly, each having an adjustingscrew 87 for regulating height and pressure, and, connected with thelatter, a bell crank lever 88, fulcrumed at 89, its forward arm beingactuated by a cam 90 on the main shaft.

For effecting the described endwise movement of the side infolders 38the following connections from the shaft may be employed. A'cam 91 onthe shaft is engaged by afollower 92 in the form of a lever centrally.fulcrumed and having a. block 93 pivoted to its top end. Adjustablyconnected to the block 93 is the slotted pusher rod 94,'the innerextremity of whichis provided with a pin 95 standing downwardly withinthe slot 82 of the infolder extension. By the described means the cam 91is able to produce the required endwise movement following the forwardmovement so as to carryout the particular method illustrated by Figs. 5to 15. I

In addition to the forward and rearward movements and the endwisemovements of the rear side infolders they are arranged to receive upwardand downward movements. Thus after the die has been positioned upon theblanks the infoldcrs are lifted from their depressed level, thus turningup the margins of the blank. They are then moved in over the blank anddie. After the die is extracted the infolders are pulled forcibly downto crease the folds, although this could be done by lifting the bed.After the folders are returned outwardly they are pulled down below thebed level. 'l hese movements are provided for through a plurality ofvertical. supporting rods 97 carrying the actuating bar 84 at theirupper ends. The actuating bar is moved upwardly or downwardly throughthe rods 97 and cam mechanism, for example as follows. On the main shaftis a grooved cam 99, engaged at its lower side by a follower 100provided on a rock arm 101, sleeved on the fulcrum shaft or axle (50.The rock sleeve carrying the arm 101 carries also two short arms 102,the extremities of which have pivoted to them the lower ends of thevertical rods 97. In this way the cam 99 is able to elevate the rearside infolders more or less. The timing of the cam determines themovements, while a pair of lock nuts 103 at the tops of the rods ellectorie'inal adjustment.

The end infolders 12 at the two ends are given similar movements tothose described, namely, in and out and up and down. As shown herein theinfolder 42 is arranged slidingly upon the top surface of a supportingblock 105, which partakes of the up and down, but not the in and outmovements of the folder plate proper. The up and down movements may beprovided for by fulcruming the supporting block 105 on a short axle 106spaced endwise from the edge of the folding bed. This structure enablesthe plate 42 to be moved in and out without its supporting block, andlowered and raised with the block. The folder plate has an upstandingrecessed lug 107 for a purpose to be described. To hold the innerportions of the plate and its supporting block in close sliding relationis shown a hold down bar or bridge plate 108 overlying the plate andconnected with the block through a pair of parallel slots 109 in theplate. This bridge serves also, through an adjustable yoke connection110, to support a gage 80.

The inward and outward movements of the end infolders may be effectedfrom a cam 112, similar to the cam 91, but timed differently. Thefollower 113 may be in the form of a lever centrally fulcrumed andcarrying at its upper end a pivoted block 11-1L This block hasadjustably secured to it a pusher rod 115 which extends inwardly and isthere provided with a pin 116 entering the recess in the lug 107.

By this arrangement the timing of the cam determines the movements ofthe end infolder plate. These movements may be independent of. theendwise movements of the side infolder plate produced by the cam 91.However, in employing the special form of infolder plate 4 1, shown inFig. 16, only one of the cams, 91 or 112, will be necessary, since theinward movement of the end folder part 4.8 is the same movement as theendwise movement of the notched folder part 45. In this case the recessor bay 19 accommodates the portion of the cloth margin at the cornerwhich is not formed into an upstanding or intermediate flap.

For producing the up and down movements of the end infolder thefollowing mechanism may be employed. The flat block or supporting plate105 beneath the end folder l2 is provided with an upstanding lug 118projecting through an aperture in the folderplate. This lug is laterallyrecessed so as to have sliding engagement with a slide block 119 formedat the inner edge of the overhan ing projection 120 of a lever 121fulcrume at 122 upon a special bracket 123,adjustably secured by bolts124: to the front of the machine frame. By lifting or lowering the lever121 the supporting block and infolder are correspondingly lifted andlowered about their fulcrum. This may be effected from the cam 125 onthe main shaft. The cam follower 126 is mounted on an arm 127, fulcrumedon a roclc sleeve 128, which is also provided with short arms 129, eachconnected by a rod 180 to the swinging lever 121. In this way the cammay effect the lowering and elevating of the end infolder, and actionmay be adjusted through the connection 131 at the top of the rod 130.The elements 127, 128 and 129 are fulcrumed on an axle 67 correspondingto the similar axle 66 at the rear.

The timing of operations may be substantially as follows, from whichthecontours of the cams are determinable without requir ing to be hereinshown in development. After the die has descended upon the blank,properly positioned upon the bed, the infolders commence action. Fig. 5shows the blank in position. Fig. 6 shows the die upon the blank and theinfolding commenced. The rear side infolder is first lifted, by cam 99,above the level of the bed and die, turning up the side margin as inFigs. 6 and 11. The side infolder is then moved inwardly, by cam 90,that is forwardly to a partial. ezitent and pauses or dwells with theparts as in. Fig. 7, the blank as in Fig. 12. During this motion theintermediate flap or loop 30 has been formed. by the horn, projection,or finger 40, but could be formed by a separate or other flap formingmeans. The rear side infolder is thereupon moved endwise, to a partialextent, by the cam 91, and comes to a pause.

This is shown effected to release the goods, and the die also lifts orrelaxes slightly, followed by the collapsing and forward movement of thedie plates to remove them from the folds, after which the die may riseto original position. All the infolders may now be depressed bythe cams99 and 125 and after a sufficient period of pressure, aided by theheating of the bed, the pressure cams release and the folders are all.moved outwardly by the cams 90, 91 and .112, and thereupon descend totheir original depressed position; upon which the folded blank may beremoved and a fresh one inserted.

It will be noticed that the infolded blank of this invention is one inwhich the infolded. [)Oltlflllfj at a pointed corner or apex arearranged in orderly manner in flat fortions or folds, and that there arean odd number of layers greater than three, namely live, but increasedto seven if two inter-- mediate flaps should be formed or one flapformed and folded back upon itself. Stated another way, the infoldedblank comprises the inturned lineal margins which meet at the corner andone or more flaps or loops of material composed of the excess marginal.material at the blank corner. The method involves the folding in of thetwo lineal margins, and arranging and laying down flatly in the form offlaps the excess corner material, preferably in advance of complet ingthe lineal folds. In any case there are live or more flat layers ofinfolded fabric superimposed within the angle of the corner, The linealfolds and flaps are produced by three operations, or perhaps more.Specifically one lineal margin is folded in and down and the cornermaterial is formed into a flap and laid upon the first fold and then thesecond lineal margin is folded in upon that. All the. operations areeffected in immediate sequence, in the same machine, and withoutshifting of die or blank, an important factor in attaining commercialre: sults.

described a folding machine or apparatus, a folding method, and a foldedblank or article, embodying the principles and attaining the advantagesof the present invention. Since many matters of arrangement,combination, structure, order of steps and detail may be variouslymodified without departing from the principles it is not in- It willthus be seen that there has been tended to limit the invention to suchmatters except in so far as set forth in the appended claims.

that is claimed is:

' 1. In an infolding machine means for supporting a blank and definingan acute pointed corner thereof, a first infolding means for infoldingone lineal blank margin adjacent the corner and forming the cornermaterial into an upstanding flap and laying it down upon thefirst linealfold, and a second infolding means for infolding the secondlineal marginthereupon.

2. A machine for infolding blanks for collars or analogous articleshaving an acute-angled corner, comprising the blank su porting anddefining elements, an infoider operated to turn in one of the linealmargins meeting at the corner, means for forming the corner materialinto a flap and laying the same over upon the first infolded marginwholly within the final outline, and an infolder operated to turn in theother lineal margin upon the first margin and it machine as in claim 2and wherein the means forming the corner material into a flap consistsof an extension at the end of the first infolder forming a shallow notchadapted to form the excess material into an upstanding flap as theinfolder moves in, and then press it laterally upon the first fold inposition to be covered and concealed by the other lineal fold,

4. In a machine for infolding blanks having sharp corners, an infolderfor the sharp corner, having a lineal edge for one of the lineal marginsand formed with a notch near the corner adapted to form the excesscorner material into an'upstanding flap as the infolder moves in, and anextension to said infolder adapted to infold the other lineal marginafter the flap has been formed,

: with a bay between the notch and extension, and means for moving saidinfolder inwardly toward the first margin to fold it and form the cornermaterial into an upstanding fiap and then lay the flap upon the firstfold and then fold the second marin.. V

1 5. A machine as in claim 2 and wherein the first infolder has a notchnear the blank apex and the means for forming the flap is a horn orfinger separated from the infolder edge by said notch.

6. Infolding means comprising two lineal infolders for the edges of ablank meeting at a pointed corner, the first of them having a notch andflap-forming finger and means for operating the first infolder t0 infoldone margin and form and lay over the flap and then operating the secondinfolder to infold the second margin over the flap and first fold.

7. Infolding means comprising two lineal infolders for the edges of ablank meeting at a pointed corner, the first of them having a notch andfinger near the corner and means for operating the first infolder tomove first inwardly to infold the margin and forman upstanding flap andthen longitudinally'to lay down the flap and then operating the secondinfolder.

' 8. In an infolding machine, a bed, a notched infolder, an actuatingbar movable toward and from the blank, carrying said infolder in andout, said infolder being movable longitudinally on the actuating bar, aconstantly rotating cam below the level of the bed, a vibrating camlever extending upwardly, and an adjustable link or pusher bar connectedto the infolder and lever, for actuating the infolder longitudinally.

9. In an infolding machine, a bed, a notched infolder, an actuating barmovable toward and-from the blank, carrying said infolder in and out,said infolder being movable longitudinally on the actuating bar, andmeans for moving the infolder longitudinally consisting of an extensionto said infolder, and a pusher bar, with a pin and slot connectionbetween them, and cam means for actuating the pusher bar.

10. In an infolding machine for sharp cornered collar blanks a raisedblank support shaped to conform to the sharp corner, a sharp pointed diefor defining the blanks, infolders normally below the die position,comprising an infolder adjacent one lineal margin of the blank, withmeans at the corner to form the corner fabric into a flap, and aninfolder adjacent the other lineal margimeach of said infolders havingde pending shoulders adapted to move inward to the pad at both edges toforce the fabric to the acute an led shape, and means for actuating theinlolders to lift and move inwardly to lay the fabric margins and flapflatly in place within said corner.

11. An infolding machine as in claim 2 and wherein is a blank supportingpad shaped to the sharp corner, and said infolders have dependingshoulders movable inward to the pad.

In testimony whereof I have, afiixed my signature hereto.

WALTER L. DIXON.

